| 燕山及邻区中新生代挤压与伸展的转换和成矿作用 |
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| 引用本文：马寅生,吴满路,曾庆利.2002.燕山及邻区中新生代挤压与伸展的转换和成矿作用[J].地球学报,23(2):115-121. |
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| 基金项目:国家自然科学基金重点项目(40132020)，大地调项目“燕山地区中生代陆内造山过程地质记录调查”，国家攀登计划(G1999043214)，地质矿产部九五重点科技项目“燕山造山带造山作用过程及动力学机制” |
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| 中文摘要:通过燕山及邻区中新生代区域性不整合界面、断裂演化、盆地演化、变质核杂岩和岩浆活动等地质事实论述了燕山及邻区中新生代挤压与伸展的转换过程及其与区域成矿作用的关系。认为燕山及邻区中新生代的构造演化过程是在前中生代华北克拉通岩石圈基础上发育起来的克拉通内（陆内）成盆沉积与挤压变形的交替演化过程，在这一构造演化过程中，存在中三叠世末（老虎沟组或杏石口组前，峰值年龄≥215Ma)、早侏罗世末（海房沟组或九龙山组前，峰值年龄≥178Ma)、晚侏罗世末（义县组或东岭台组前，峰值年龄≥135Ma）、白垩纪末（古近系前，峰值年龄65Ma)、古近纪末（新近系前，峰值年龄25Ma)5个挤压作用时期。5个挤压期在时间上相对较短，期间为早中三叠世、晚三叠世－早侏罗世、中晚侏罗世、白垩纪、古近纪、新近纪至第四纪6个时间较长，相对和缓或伸展的成盆沉积期一一隔开。在时间上，主成矿期与强烈伸展期相对应；在空间上外生矿产受伸展地所控制，内生矿产的分布受盆地间隆起带控制。总体上，挤压作用由强变弱，伸展作用由弱变强。伸展作用持续的时间长，挤压作用持续时间相对较短。挤压作用和伸展作用交替出现，挤压机构和伸展构造间互发育，成矿作用与挤压和伸展的转换存在着密切的成生联系。 |
| 中文关键词:燕山 挤压作用 伸展作用 成矿作用 |
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| The Mesozoic-Cenozoic Compression and Extension Transformation Process and Ore-forming Process in Yanshan and Adjacent Area |
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| Abstract:The Mesozoic-Cenozoic compression and extension transformation process and ore-forming process in Yanshan and adjacent areas were studied on the basis of the geology of the regional unconformity, the evolution of faults, basins, metamorphic core complexes and magmatic activities in Mesozoic-Cenozoic. The authors consider that the Mesozoic-Cenozoic tectonic evolution process in Yanshan and adjacent areas was an alternately developing process of intracontinental (or intraplate) basin sedimentation and compression deformation in the basement of North China Craton. There occurred five times of compression deformation in the process, namely the compression deformations at the end of Middle Triassic (before Laohugou formation or Xingshikou Formation (≥215 Ma), Early Jurassic (before Haifanggou Formation or Jiulongshan Formation (≥178 Ma), Late Jurassic (before Yixian Formation or Donglingtai Formation (≥135 Ma), Cretaceous (before Paleogene, 65 Ma) and Paleogene (before Neogene, 25 Ma). These five compressions were relatively short in time. There also existed six periods of sedimentary basin formation that were longer in time and more gentle and extensional in tectonic activity between the five times of compression. The six periods of sedimentary basin formation are Early and Middle Triassic, Late Triassic and Early Jurassic, Middle and Late Jurassic, Cretaceous, Paleogene, Neogene and Quaternary. The main ore-forming periods agree with the extension in time. The distribution of exogenic ore deposits is controlled by the extension basins, whereas he distribution of endogenic ore deposits is controlled by the upwarping belts between the basins. In general, the compression tended to evolve from strong to weak, while the extension from weak to strong in the process. The compression was short in time, while the extension lasted longer in time. The compression and extension occurred alternately, and hence compression structures and extension structures developed alternately in the structural evolution. There existed a close genetic relation of the ore-forming process to the compression and extension transformation process in Mesozoic-Cenozoic. |
| keywords:Yanshan compression extension ore-forming process |
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